Bridge circuits 1 Charging (batteries) 1 Drones 1 Efficiency 1 Energy transfer 1 Fabrication 1 Inductive power transmission 1 Inductive powertransfer (IPT) 1 Lithium alloys 1 Lithium-ion batteries 1 Low pass filters 1 Multiple transmitters 1 Power MOSFET 1 Power receivers 1 Power transmitters 1 Receiver coil 1 Transmitter coils Transmitters 1 Wireless power 1 Wireless power receiver 1 Wireless power transmitter 1 drones 1 inductive power transfer 1 lithium polymer battery 1 wireless power receiver 1 wireless power transfer 1 wireless power transmitter 1